Finance Receivables and Loans, Net (Financing Receivable Gross Charge-Offs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023	$ 2
2022	241
2021	187
2020	57
2019	42
2018 and prior	39
Revolving loans	32
Revolving loans converted to term	1
Total	601	$ 301
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2
2022	241
2021	187
2020	57
2019	42
2018 and prior	39
Revolving loans	32
Revolving loans converted to term	1
Total	601
Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
2023	2
2022	220
2021	178
2020	56
2019	42
2018 and prior	38
Revolving loans	0
Revolving loans converted to term	0
Total	536	276
Consumer | Consumer mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
2018 and prior	1
Revolving loans	0
Revolving loans converted to term	0
Total	1	1
Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
2018 and prior	1
Revolving loans	0
Revolving loans converted to term	0
Total	1
Consumer | Other
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	21
2021	9
2020	1
2019	0
2018 and prior	0
Revolving loans	32
Revolving loans converted to term	1
Total	64	$ 24
Consumer | Personal Lending
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	21
2021	9
2020	1
2019	0
2018 and prior	0
Revolving loans	0
Revolving loans converted to term	0
Total	31
Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2023	0
2022	0
2021	0
2020	0
2019	0
2018 and prior	0
Revolving loans	32
Revolving loans converted to term	1
Total	$ 33